Created by Brian McCormack and Michael McCormack in 1973, in response to the Yom Kippur War, World Peace Day promotes the creation and preservation of peace through the means of communication. The holiday also promotes peace by encouraging people to use communication over violence to resolve conflict.

According to worldhelloday.org, celebrating World Hello Day is as simple as greeting ten people today, whether they are close family members, acquaintances or complete strangers. Better yet, learn how to say “hello” in different languages. We’ll even give you a head start: